Heald frame

ABSTRACT

A heald frame for a loom the type in which two fabrics are woven simultaneously in side by side positions at high speeds. The heald frame has receiving bars which are supported in widely spaced disposition intermediate their ends to thereby provide heald receiving end regions of such width so as to be able to accept a sufficient number of healds for the production of a fabric and furthermore, provides unrestricted access to the heald receiving portions of the heald receiving bars. The heald receiving bars are secured to a support frame in the central region of the bars and thereby the bars have ends which project in cantilever manner from the frame.

United States Patent Arnold 51 Sept. 26, 1972 [541 HEALD FRAME [72] inventor: William Charles Arnold, 4 Mill Hill Drive, Winshill, Burton-on-Trent,

Staffordshire, England 22 Filed: Sept. 23, 1970 [21] Appl.No.: 74,745

Primary Examiner-James Kee Chi Att0rney-James E. Nilles [57] ABSTRACT A heald frame for a loom the type in which two fabrics are woven simultaneously in side by side positions at high speeds. The heald frame has receiving bars which are supported in widely spaced disposition intermediate their ends to thereby provide heald receiving end regions of such width so as to be able to accept a sufficient number of healds for the production of a fabric and furthermore, provides unrestricted access to the heald receiving portions of the heald receiving bars. The heald receiving bars are secured to a support frame in the central region of the bars and thereby the bars have ends which project in cantilever manner from the frame.

3 Claims, 3 Drawing Figures [52] US. Cl ..139/9l, 139/57 [51] Int. Cl. ..D03c 9/06, D03c 13/00 [58] Field of Search ..l39/91, 92, 82, 83, 55, 57

[ 56] References Cited v I UNITED STATES PATENTS 993,685 5/1911 Holmes ..139/9l 2,510,404 6/1950 Lake et al ..l39/83 3,169,555 2/1965 Koyder et al. ..139/91 761,677 6/1904 Howard ..139/91 FOREIGN PATENTS OR APPLICATIONS 60,159 12/1891 Germany ..l39/9l PATENTEDserzs 1912 3,693. 667

INVENTOR:

W :U/M

HEALD FRAME This invention concerns narrow-fabric weaving looms and in particular a heald frame for such a loom.

It is usual in heald frame construction for the healds to be arranged to be supported on heald bars mounted wholly within a rectangular area defined by the heald frames. Normally the heald bars span the width of the heald frame and are attached at their ends to the sidemembers of the heald frame and also in some instances to the upper or lower members of the frame. Guide means are usually provided along the outermost edges of the side members of the heald frame.

it is an object of this invention to provide heald frame for narrow-fabric weaving loom of the type wherein two fabrics may be woven simultaneously in side-by-side positions and at high speeds, such heald frame permitting improved accessibility to the healds and hence rapid mounting and removal of the healds from the heald frame with consequent minimizing of loom down-time which is of great importance to the economic operation of such a loom.

It is a further objectof this invention to provide a heald frame for such a loom which permits of uninterrupted viewing of the warp threads from the side of the loom.

' According to the present invention there is provided a heald frame characterized in that the heald receiving bars are supported in spaced disposition intermediate theirends thereby to provide heald receiving end regions of such width as to accept a sufficient number of healds for the production of a fabric and to enable unrestricted access to the heald receiving portions of the heald receiving bars to be achieved.

The invention will now be described further, by way of example only, with reference to the accompanying drawings.

FIG. 1 shows a side elevation of a loom arranged to include heald frames according to the invention.

FIG. 2 shows a plan view of such a loom.

FIG. 3 shows a front view of a heald frame of the loom of FIGS. 1 and 2 drawn to a larger scale.

As shown in the drawings, and in particular in FIG. 3, there is provided a heald frame body 1, of substantially flat and relatively thin material, for example a pressing of aluminum or steel, or a moulding of plastics material or the like. Upper and lower heald bars 2, are attached to the heald frame body 1, by means of adhesive, rivets, screws or the like or by a combination of such means, at such a distance apart from each other as to suit the length of healds 3, which are to be supported from the heald bars 2 in a known manner. The heald bars 2, project from each side of the heald frame body 1, in a cantilever fashion and to an extent determined by the distance apart and the width of two tapes 4, which are to be woven side-by-side as shown in FIG. 2.

In the construction just described the heald frame body 1, is adapted to be located entirely between the two tapes 4, and thus the healds 3 can be placed upon or removed from the heald bars 2 without impedance. Conveniently there may be provided small spring clips '5, or the like on the ends of the heald bars 2 in order to obviate accidental displacement of the healds 3 during operation of the loom.

The heald frame body I, is further provided with bearing strips 6, which operate in slotted slide blocks 7,

m unt d i the loom r0 er which is n rall digategby t he reference nu i neral 9 and wfiicl? seri e i o constrain the heald frame assembly in a correct attitude in the loom and permit satisfactory functioning,

A pivotal connection member 8 is attached to the heald frame body 1 at a convenient position to provide a means for connecting the heald frame to' a drive means derived from the loom proper in a known manner.

lclaim:

l. A heald frame for a narrow fabric needle loom including a central body and heald supporting bars cartied in spaced disposition thereon and driven from below by means attached to the body characterized in that the heald receiving bars extend outwardly from the central body to provide heald receiving end regions of such width as to accept a sufficient number of healds for the production of a fabric and to enable unrestricted access to the heald receiving portions of the heald receiving bars to be achieved.

2. A heald frame as claimed in claim 1 in which the heald frame body is provided at each of its sides with a bearing strip adapted, in use, to seat and slide in slotted guide blocks carried in the loom.

3. A narrow fabric needle loom of the type for serving two fabrics simultaneously in side-by-side positions and at high speeds characterized by the provision in said loom of a heald frame including a centrally located frame, heald receiving bars supported in spaced apart relationship on said centrally located frame, said bars being supported intermediate their length and having their ends projecting in cantilever manner from the centrally located frame, said bars defining heald receiving end regions of sufficient width to accept a number of healds for the production of a fabric and to enable unrestricted access to the heald receiving regions of said bars, and heald retaining clips mounted at the outer ends of each of said heald bar. 

1. A heald frame for a narrow fabric needle loom including a central body and heald supporting bars carried in spaced disposition thereon and driven from below by means attached to the body characterized in that the heald receiving bars extend outwardly from the central body to provide heald receiving end regions of such width as to accept a sufficient number of healds for the production of a fabric and to enable unrestricted access to the heald receiving portions of the heald receiving bars to be achieved.
 2. A heald frame as claimed in claim 1 in which the heald frame body is provided at each of its sides with a bearing strip adapted, in use, to seat and slide in slotted guide blocks carried in the loom.
 3. A narrow fabric needle loom of the type for serving two fabrics simultaneously in side-by-side positions and at high speeds characterized by the provision in said loom of a heald frame including a centrally located frame, heald receiving bars supported in spaced apart relationship on said centrally located frame, said bars being supported intermediate their length and having their ends projecting in cantilever manner from the centrally located frame, said bars defining heald receiving end regions of sufficient width to accept a number of healds for the production of a fabric and to enable unrestricted access to the heald receiving regions of said bars, and heald retaining clips mounted at the outer ends of each of said heald bar. 